Dual Backup Memory; Service Precautions - Marantz SR6004 Service Manual

8. DUAL BACKUP MEMORY

This product has a Dual Backup Memory function. The
conventional Backup functions to memorize, in the EEP-
ROM (IC89) in the circuit, a current setting of the moment the
main power is turned off so that it can be restored when it is
turned ON again. Meanwhile, the DUAL BACKUP MEMORY
is capable of memorizing any arbitrary setting that is
configured while the product is in operation so as to restore
it at any time.
When servicing units returned from end-users for repairs,
use this function to back up the current setting (e.g. Tuner
Preset). This will enable the units to be returned to the users
after repairs, with the setting unchanged.
NOTE : If end-users use this function, the data will be
overwritten.
• HOW TO OPERATE
-Backup-
1. Configure a setting you would like to save in the MEMO-
RY and hold down the [MEMORY] and [ENTER] buttons
on the Front Panel at the same time for 3 seconds or
more.
2. The FL Display indicates "MEMORY SAVING" while the
Backup is being performed.
3. The FL Display indicates "COMPLETE" when the Backup
is completed.
-Recovery-
1. Hold down the [MEMORY] and [MENU] buttons on the
Front Panel at the same time for 3 seconds or more. s
2. The FL Display indicates "MEMORY LOAD" while the
Recovery is being performed.
3. After the FL Display indicates "COMPLETE", the product
goes into Standby mode. When the power is restored, the
Recovery is completed. The FL Display indicates "NO
BACKUP" if the DUAL BACKUP MEMORY has not been
activated with no data to be recovered saved in the
Memory. This function does not back up the levels of
Main ZONE Volume, ZONE A Volume and ZONE A
Speaker Volume. When the Recovery is done, -
cated.

• SERVICE PRECAUTIONS

When the Flash Rom (IC89) on the INPUT PWB is replaced
or when the DSP CODE is rewritten for a version upgrade,
make sure, in order to maintain consistency with the Backup
Memory, to clear the DUAL BACKUP MEMORY in
thefollowing way :
-How to clear the Backup Memory--
1. Hold down the [MEMORY] and [CLEAR] buttons on the-
Front Panel at the same time for 3 seconds or more. s
2. The FL Display indicates "BACKUP CLEAR" while the
memory is being cleared.
3. After the FL Display indicates "COMPLETE", the opera-
tion is completed.
is indi-
31
s